Diagnostic device



FIG. 1 is a perspective view of a diagnostic device showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines immediately adjacent the shaded areas represent the bounds of the claim. All other broken lines are directed to unclaimed portions of the diagnostic device. None of the broken lines form a part of the claimed design. 

CLAIM The ornamental design for a diagnostic device, as shown and described. 